He has been a frequent guest on the business TV program Kudlow & Company on CNBC, where supply-side economics fan Lawrence Kudlow hosts. He is a supply-side fan like Kudlow. Siegel is also a lifelong friend of Robert Shiller, an economist at the Yale School of Management, who Siegel has known since their MIT graduate school days. Siegel and Shiller have frequently debated each other on TV about the stock market and its future returns, and have become financial media celebrities, regularly appearing on CNBC.

At the 2006 Berkshire Hathaway annual meeting, Berkshire Vice Chairman, Charlie Munger, called Jeremy Siegel "demented" for "comparing apples to elephants" in making future predictions.[1]. Siegel's personal, for-profit website [2] is highly atypical among academic professors. In addition, Siegel has not published any peer-reviewed academic works over the past decade [3]